Table 6-3: Troubleshooting Wireless Field Devices
Issue Troubleshooting steps
Wireless device
does not appear
on the network
1. Verify the device has power.
2. Verify the device is within effect communications range.
3. Verify the proper Network ID has been entered into the device.
Wireless device
appears in the join
failure list
1. Re-enter the Network ID and Join Key into the device.
Wireless device
appears with
service denied
1. Verify the total number of devices on the network (100 max).
2. Go to SETUP → NETWORK → BANDWIDTH and click analyze bandwidth.
(Note: any changes will require the network to reform)
3. Reduce the update rate for the device.
Table 6-4: Troubleshooting Modbus Communications
Issue Troubleshooting steps
Can not communicate
using Modbus RTU
1. Verify the use of RS-485.
2. Verify wiring connections. See Section 3: Installation.
3. Verify if termination is required.
4. Verify that Modbus serial communications setting in the Gateway
match the Modbus Host settings. Log on to the Gateway and
navigate to SETUP → MODBUS → COMMUNICATIONS.
5. Verify the Modbus address for the Gateway.
6. Verify Modbus register mapping in the Gateway. Log on to the
Gateway and navigate to SETUP → MODBUS → MAPPING.
Can not communicate
using Modbus TCP
1. Verify secure / unsecure Modbus protocol settings in the Gateway.
Log on to the Gateway and navigate to SETUP → SECURITY →
PROTOCOLS.
2. Verify the Modbus TCP communications settings in the Gateway.
Log on to the Gateway and navigate to SETUP → MODBUS →
COMMUNICATIONS.
3. Verify Modbus register mapping in the Gateway. Log on to the
Gateway and navigate to SETUP → MODBUS → MAPPING.
Reference Manual Troubleshooting
00809-0200-4420 September 2020
Emerson.com/Rosemount 59
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